Details
Three cases of objectives
containing eleven (of twelve) various objectives, each in Beck quick-release mount, with plaque on each case Beck London Object Glass Changer -- each 7¾in. (19.5cm.) wide, 20th century (3)
containing eleven (of twelve) various objectives, each in Beck quick-release mount, with plaque on each case Beck London Object Glass Changer -- each 7¾in. (19.5cm.) wide, 20th century (3)